CN202494660U - Testing device of lithium ion migration performance of electrolyte - Google Patents

Testing device of lithium ion migration performance of electrolyte Download PDF

Info

Publication number
CN202494660U
CN202494660U CN2012200798215U CN201220079821U CN202494660U CN 202494660 U CN202494660 U CN 202494660U CN 2012200798215 U CN2012200798215 U CN 2012200798215U CN 201220079821 U CN201220079821 U CN 201220079821U CN 202494660 U CN202494660 U CN 202494660U
Authority
CN
China
Prior art keywords
lithium ion
electrode
testing
electrolytic solution
container
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2012200798215U
Other languages
Chinese (zh)
Inventor
郭佳丽
李乐华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningde Amperex Technology Ltd
Dongguan Amperex Technology Ltd
Original Assignee
Ningde Amperex Technology Ltd
Dongguan Amperex Technology Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningde Amperex Technology Ltd, Dongguan Amperex Technology Ltd filed Critical Ningde Amperex Technology Ltd
Priority to CN2012200798215U priority Critical patent/CN202494660U/en
Application granted granted Critical
Publication of CN202494660U publication Critical patent/CN202494660U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Secondary Cells (AREA)

Abstract

The utility model belongs to the technical field of testing equipment and in particular relates to a testing device of lithium ion migration performance of an electrolyte. The testing device comprises a container and a sealing cover which matches with the container, wherein an electrode is arranged on the sealing cover; one end of the electrode is connected with a fixed tube placed in the container; and the other end of the electrode penetrates through a central inserting hole in the sealing cover and is exposed out of the central inserting hole to be connected with a testing joint of a testing instrument. Compared with the prior art, the testing device of the lithium ion migration performance of the electrolyte, provided by the utility model, has the advantages as follows: by using an assembling structure of the fixed tube and the electrode, the opposite area and distance of lithium sheets can be fixed, so that the repeatability and operability of testing are improved; meanwhile, the tested lithium sheet can be kept in good extruding contact with the fixed tube and the electrode, so that the positions of the lithium sheets and the distance between the lithium sheets are prevented from changing in the testing process and the testing accuracy is improved. In addition, the testing device has a simple structure, and can be used for testing both the lithium ion migration number of the electrolyte and the electric conductivity of the electrolyte; and the tested object comprises various liquid electrolytes and also comprises gel electrolytes.

Description

A kind of proving installation of electrolytic solution lithium ion mobility ability
Technical field
The utility model belongs to the testing apparatus technical field, relates in particular to a kind of proving installation of lithium ion mobility ability of electrolytic solution.
Background technology
Lithium ion battery has obtained using widely in portable electric appts.Along with the arrival of information age, its range of application is expansion rapidly.In order to improve the performance of lithium ion battery, to adapt to the needs of every field commercial applications, the development of heavy-duty battery material has become present research focus.
Nonaqueous electrolyte is the important component part of lithium ion battery, and it is conduct charges and reactive material in the battery---the medium of lithium ion, and the size of battery operated electric current is decided by lithium ion transmitting speed in nonaqueous electrolyte.Li in the electrolyte +Migrate attribute comprise conductivity and Li +The content of two aspects of transport number.Conductivity is an electrolytical important physicochemical characteristic parameter, and it has reacted the speed of electrolyte conduction current.During lithium ion battery work, Li +Be the unique material that on both positive and negative polarity, embeds/take off the embedding reaction, so Li +Transport number battery performance is had considerable influence.
Conductivity and Li about electrolytic solution +Transport number, early stage research work mainly are by solution theory, set up physical model, and are aided with Theoretical Calculation and carry out.Theoretical Calculation has theory directive significance to the researchs such as conductivity, degree of association and transference number of ions of lithium-ion battery electrolytes.But the foundation of physical model need take a long time research, and also need test the correctness of verifying this model, can not obtain experimental result more accurately and reliably at once.
The method that the classic methods AC impedance method that to be people such as Bruce time proposed in " Vincent C A, Bruce P G.Polymer " 28 phase 2324-2328 beginnings of the page in 1987 and DC polarize and combine in the electrochemistry experiment analytical approach.People such as Zhou Ruqi have roughly described related test step by step device blank in 1996 on " galvanochemistry " second volume first phase 41-46 page or leaf: adopted stainless steel before this | electrolytic solution | and the stainless steel system; Adopt the lithium sheet then | electrolytic solution | lithium sheet system.Subsequently; People such as Vincenzo have described the device of direct test two electrode unblock batteries in " Journal of Power Sources " 141 phase 167-170 pages or leaves in 2005: lithium sheet and stainless steel electrode are tightly sticked together; Stop with barrier film between the electrode of two symmetries, whole devices is immersed in the electrolytic solution tests.Though people's such as Zhou Ruqi and Vincenzo device can be measured lithium ion transference number; But because the lithium sheet over against area be difficult to that unanimity, two interelectrode distances are not exclusively fixing, electrode and lithium sheet fit tightly factors such as there being certain degree of difficulty, test poor repeatability, problem such as not easy to operate appear easily.It will be further appreciated that these devices can not be measured Li when accurately testing lithium ion transference number +The another one of migrate attribute weigh parameter---conductivity.
In view of this, the necessary proving installation that a kind of electrolytic solution lithium ion mobility ability is provided, this device both can accurately have been tested the lithium ion transference number of electrolytic solution, can draw the conductivity of this electrolytic solution simultaneously again.
The utility model content
The purpose of the utility model is: be directed against the deficiency of prior art, and a kind of proving installation of electrolytic solution lithium ion mobility ability is provided, this device both can accurately have been tested the lithium ion transference number of electrolytic solution, can draw the conductivity of this electrolytic solution simultaneously again.
To achieve these goals, the utility model adopts following technical scheme:
A kind of proving installation of electrolytic solution lithium ion mobility ability; Comprise container and the gland bonnet that matees with said container; Said gland bonnet is provided with electrode; One end of the said electrode stationary pipes interior with placing said container links to each other, and the center hub that the other end passes on the gland bonnet is exposed the test splice that is used to connect testing tool.Wherein, described electrode is the inertia conductive metallic material, as: tungsten, titanium, platinum etc., to prevent the faint reaction of electrode and electrolytic solution, reduce the appearance of test concentration polarization, improve accuracy rating of tests; Described container and gland bonnet are all macromolecule insulation resistant materials such as Teflon, to prevent the corrosion of electrolytic solution to container and gland bonnet.
As the utility model electrolytic solution lithium ion mobility can a kind of improvement of proving installation, said stationary pipes is provided with liquid-leadage hole.
As the utility model electrolytic solution lithium ion mobility can a kind of improvement of proving installation, said stationary pipes two ends are provided with helicitic texture.The effect of the assembling of stationary pipes and electrode is: can make on the one hand the lithium sheet be able to fix over against area and distance; Test lithium sheet is contacted well in the extruding of stationary pipes and electrode; Prevent the change of lithium sheet position and distance in the test process, improve accuracy rating of tests.
As the utility model electrolytic solution lithium ion mobility can a kind of improvement of proving installation, the quantity of said electrode is two, said electrode and stationary pipes are through being threaded.
As the utility model electrolytic solution lithium ion mobility can a kind of improvement of proving installation, a plurality of sealing column are set on the said wall of a container, gland bonnet is provided with the peripheral jack corresponding with said sealing column.
As the utility model electrolytic solution lithium ion mobility can a kind of improvement of proving installation, said sealing column upper end is provided with screw.Thereby can make electrolytic solution keep sealing state period effectively in test.
As the utility model electrolytic solution lithium ion mobility can a kind of improvement of proving installation, said gland bonnet is provided with the boss with the opening coupling of said container, thereby can make electrolytic solution keep sealing state period in test.
With respect to prior art, the stationary pipes that adopts in the utility model and the package assembly of electrode, can make on the one hand the lithium sheet be able to fix over against area and distance, thereby improve test repeatability and operability; Test lithium sheet is contacted well in the extruding of stationary pipes and electrode, prevent the change of lithium sheet position and distance in the test process, the raising accuracy rating of tests.In addition, the utility model is simple in structure, can test the lithium ion transference number of electrolytic solution, can test the conductivity of electrolytic solution again, and the object of its test comprises various liquid electrolytes, also comprises gel electrolyte, thereby is Li in the electrolytic solution +The assessment of migrate attribute the accurate data support is provided, and then reliable means are provided for accurate assessment battery performance.
Description of drawings
Fig. 1 is the main TV structure synoptic diagram of the utility model;
Fig. 2 is the plan structure synoptic diagram of the utility model;
Fig. 3 is the structural representation of electrode and stationary pipes coupling part in the utility model.
Embodiment
Shown in Fig. 1 to 3; The proving installation of a kind of electrolytic solution lithium ion mobility ability of the utility model; Comprise container 1 and the gland bonnet 2 that matees with said container 1; Said gland bonnet 2 is provided with electrode 3, and an end of said electrode 3 links to each other with stationary pipes 4 in placing said container 1, and the center hub 6 that the other end passes on the gland bonnet 2 is exposed the test splice 7 that is used to connect testing tool.
Wherein, said stationary pipes 4 is provided with liquid-leadage hole 11.
Said stationary pipes 4 two ends are provided with helicitic texture.
The quantity of said electrode 3 is two, and said electrode 3 and stationary pipes 4 are through be threaded (as shown in Figure 3).
A plurality of sealing column 8 are set on the wall of said container 1, and gland bonnet 2 is provided with the peripheral jack 9 (as shown in Figure 2) corresponding with said sealing column 8.
Said sealing column 8 upper ends are provided with screw 10.
Said gland bonnet 2 is provided with the boss with the opening of said container 1 coupling.
Adopt the principle and the method for the utility model test lithium ion transference number following:
Computing formula based on AC (AC impedence method) and DC (constant voltage polarization method) test lithium ion transference number is:
t + = i s ( ΔV - i 0 R 0 ′ ) i 0 ( ΔV - i s R s ′ )
Wherein:
i 0The initial current value that-DC process obtains (A)
i sThe stable electrical flow valuve (A) that-DC process obtains
R 0The R that the AC test draws before the '-DC Ct+ R Film(Ω), wherein, R CtBe electron transfer resistance (resistance of charged transfer), R FilmBe sheet resistance (resistance of film).
R sThe R that the AC test draws before the '-DC Ct'+R Film' (Ω)
The constant voltage (V) that is applied during Δ V-DC
t +-lithium ion transference number.
R wherein 0' and R s' need carry out match to the AC spectrogram, Z-VIEW software commonly used.
Simultaneously, can be according to Re (this bulk resistor) among the result of match and lithium sheet calculate that over against area the computing formula of the conductivity of electrolytic solution is:
Conductivity＝a×L×(Re×Area)-1
The correction factor of a-anchor clamps, dimensionless unit;
Between L-lithium sheet over against the distance (cm);
This bulk resistor of Re-(Ω);
Area-lithium sheet is over against area (cm^2);
Conductivity-electrolytic conductivity (s/cm).
After operation is ready to complete, carry out the test job of electrochemical workstation, testing sequence is:
Carry out the AC test, obtain Re and R 0';
Carry out the DC test, obtain i 0And i s, and Δ V;
Carry out the AC test once more, obtain Re ' and R s';
I with gained 0, i s, R 0', R s' and Δ V be updated to and try to achieve lithium ion transference number in the formula;
With resulting Re and relevant preset parameter a, L, the electrolytic conductivity value is tried to achieve in Re and Area substitution.
The method of application of the utility model is following:
The device of the utility model is adopted sonicated, clean with clear water, absolute ethyl alcohol respectively, then 85 ℃ of oven dry of vacuum 1 hour; Electrolytic solution to be measured put into simultaneously test preceding assembling in the glove box; Assembling process is: at first handle lithium sheet 12 surfaces with the mode of scraping, brushing and make its activation and keep surfacing; Then two lithium sheets 12 are placed stationary pipes 4 both sides respectively, and with electrode 3 and the stationary pipes 4 extruding lithium sheet 12 that is nested, then the test splice in this assembly 7 is interted the center hub 6 on the gland bonnet 2 into; Electrolytic solution is placed container 1 Ei; Gland bonnet 2 is carried out nested assembling through peripheral jack 9 with sealing column 8 with container 1, and this moment, electrolytic solution passed through liquid-leadage hole 11 conduction electrodes 3, on gland bonnet 1, increased screw 10 and tightened.After the assembling; This device is kept taking out later at least two hours in glove box; And further seal in the periphery with masking foil or unsintered tape; Constant temperature leaves standstill a period of time and carries out AC impedance and constant voltage polarization test (test splice 7 is connected with testing tool), obtains lithium ion transference number and conductivity value according to the aforementioned calculation formula.
If test gel electrolyte, also need after above-mentioned part sealing and reinforcing operation is accomplished, heat Gel Treatment, this time in stage is decided (heating 4h down as 85 ℃) with system, cools off fully then and leaves standstill and can carry out follow-up test.
With respect to prior art, the package assembly of the stationary pipes that adopts in the utility model 4 and electrode 3, can make on the one hand lithium sheet 12 be able to fix over against area and distance, thereby improve test repeatability and operability; Test lithium sheet 12 is contacted well in the extruding of stationary pipes 4 and electrode 3, prevent the change of lithium sheet 12 positions and distance in the test process, the raising accuracy rating of tests.In addition, the utility model is simple in structure, can test the lithium ion transference number of electrolytic solution, can test the conductivity of electrolytic solution again, and the object of its test comprises various liquid electrolytes, also comprises gel electrolyte.
According to the announcement and the instruction of above-mentioned instructions, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned embodiment.Therefore, the embodiment that discloses and describe above the utility model is not limited to is in the protection domain of the claim that also should fall into the utility model to some modifications and the change of the utility model.In addition, although used some specific terms in this instructions, these terms are explanation for ease just, the utility model is not constituted any restriction.

Claims (7)

  1. An electrolytic solution lithium ion mobility can proving installation; It is characterized in that: comprise container (1) and the gland bonnet (2) that matees with said container (1); Said gland bonnet (2) is provided with electrode (3); One end of said electrode (3) stationary pipes (4) interior with placing said container (1) links to each other, and the center hub (6) that the other end passes on the gland bonnet (2) is exposed the test splice (7) that is used to connect testing tool.
  2. 2. the proving installation of electrolytic solution lithium ion mobility ability according to claim 1, it is characterized in that: said stationary pipes (4) is provided with liquid-leadage hole (11).
  3. 3. the proving installation of electrolytic solution lithium ion mobility ability according to claim 1, it is characterized in that: said stationary pipes (4) two ends are provided with helicitic texture.
  4. 4. the proving installation of electrolytic solution lithium ion mobility ability according to claim 3, it is characterized in that: the quantity of said electrode (3) is two, said electrode (3) and stationary pipes (4) are through being threaded.
  5. 5. the proving installation of electrolytic solution lithium ion mobility ability according to claim 1, it is characterized in that: a plurality of sealing column (8) are set on the wall of said container (1), and gland bonnet (2) is provided with the peripheral jack (9) corresponding with said sealing column (8).
  6. 6. the proving installation of electrolytic solution lithium ion mobility ability according to claim 5 is characterized in that: said sealing column (8) upper end is provided with screw (10).
  7. 7. electrolytic solution lithium ion mobility according to claim 1 can proving installation, it is characterized in that: said gland bonnet (2) is provided with the boss with the opening coupling of said container (1).
CN2012200798215U 2012-03-06 2012-03-06 Testing device of lithium ion migration performance of electrolyte Expired - Lifetime CN202494660U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012200798215U CN202494660U (en) 2012-03-06 2012-03-06 Testing device of lithium ion migration performance of electrolyte

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012200798215U CN202494660U (en) 2012-03-06 2012-03-06 Testing device of lithium ion migration performance of electrolyte

Publications (1)

Publication Number Publication Date
CN202494660U true CN202494660U (en) 2012-10-17

Family

ID=47000885

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012200798215U Expired - Lifetime CN202494660U (en) 2012-03-06 2012-03-06 Testing device of lithium ion migration performance of electrolyte

Country Status (1)

Country Link
CN (1) CN202494660U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014008764A1 (en) 2014-06-12 2015-12-17 Daimler Ag Electrochemical trial single cell
CN105510834A (en) * 2015-11-29 2016-04-20 湖南女子学院 Single-electrode test apparatus for thermoelectric chemical research

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014008764A1 (en) 2014-06-12 2015-12-17 Daimler Ag Electrochemical trial single cell
CN105510834A (en) * 2015-11-29 2016-04-20 湖南女子学院 Single-electrode test apparatus for thermoelectric chemical research
CN105510834B (en) * 2015-11-29 2018-06-01 湖南女子学院 A kind of single electrode test device for thermoelectrochemistry research

Similar Documents

Publication Publication Date Title
Guarnieri et al. Developing vanadium redox flow technology on a 9-kW 26-kWh industrial scale test facility: Design review and early experiments
Ecker et al. Parameterization of a physico-chemical model of a lithium-ion battery: I. Determination of parameters
Kim et al. Modeling the dependence of the discharge behavior of a lithium-ion battery on the environmental temperature
Zhu et al. Studies on the medium-frequency impedance arc for Lithium-ion batteries considering various alternating current amplitudes
Dees et al. Electrochemical modeling and performance of a lithium-and manganese-rich layered transition-metal oxide positive electrode
Duan et al. A coupled electrochemical–thermal–mechanical model for spiral-wound Li-ion batteries
Uddin et al. The impact of high-frequency-high-current perturbations on film formation at the negative electrode-electrolyte interface
CN104914312A (en) Method of calculating AC impedance spectroscopy relaxation time distribution
CN105301501A (en) Method for estimating generated heat of lithium ion battery under conditions of charge and discharge
Hossain et al. Effective mass transport properties in lithium battery electrodes
CN106532107A (en) Lithium-ion button-type total battery used in experiments and manufacturing method thereof
Bergstrom et al. Interfacial effects on transport coefficient measurements in Li-ion battery electrolytes
CN105510174A (en) Apparatus and method for detecting gas inside battery
CN104614678B (en) A kind of lead-acid accumulator is internalized into the on-line measuring device and method of process battery electrode current potential
CN202494660U (en) Testing device of lithium ion migration performance of electrolyte
CN102445364A (en) Gathering device of gas produced in lithium ion battery
Priimägi et al. Thermal simulations of polymer electrolyte 3D Li-microbatteries
CN102937615B (en) Method for detecting shell stability of lithium ion battery
CN202383265U (en) Battery test device
Zhou et al. Construction of simplified impedance model based on electrochemical mechanism and identification of mechanism parameters
Erol Process model development of lithium-ion batteries—an electrochemical impedance spectroscopy simulation
CN105487017A (en) Valve-regulation sealed lead acid battery state estimation and prediction method used for transformer substation UPS
Prasad et al. Reduced order impedance models of lithium ion batteries
Xu et al. Direct current internal resistance decomposition model for accurate parameters acquisition and application in commercial high voltage LiCoO2 battery
CN105676031B (en) Lithium ion battery electrode material electric performance testing device and battery production method

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CX01 Expiry of patent term

Granted publication date: 20121017

CX01 Expiry of patent term